Abstract: The invention provides a tocopherol derivative, preparation method therefor, and uses thereof. The tocopherol derivative is a compound with the following structure. wherein R? is hydrogen or an acetyl group; the theanine and tocopherol are esterified in the presence of a catalyst and a co-catalyst to obtain the tocopherol derivative. The compound can be used as an antioxidant in cosmetics, food and health products, pet products, etc. The method has mild reaction conditions, simple operation, high yield, high synthesis efficiency, economic and environmental protection, and has good application prospects.

Abstract: Embodiments of this application provide a speaker module and an electronic device, and relate to the technical field of electronic devices. The electronic device includes an overall housing and at least one speaker. A sound outlet hole is provided on the overall housing. The speaker includes a speaker kernel, a front cavity, and a rear cavity, the front cavity has a sound outlet channel, and the sound outlet channel is in communication with the sound outlet hole. The speaker further includes an auxiliary cavity, and at least a part of the auxiliary cavity is located on a side of the front cavity facing away from the speaker kernel. The auxiliary cavity includes a transmission channel and a silencing cavity in communication with the transmission channel, the transmission channel is in communication with the front cavity through an auxiliary hole.

Abstract: Disclosed are a modified aspartate resin and an aqueous dispersion, which relate to the technical field of aqueous emulsion. The modified aspartate resin is obtained by reacting a hydrophilic aspartate resin with a polyisocyanate compound, followed by reaction with a hydrophobic aspartate resin. The modified aspartate resin exhibits moderate hydrophilicity, enabling self-emulsifying dispersion in water to form an aqueous dispersion. The film formed from the aqueous dispersion after curing shows good water resistance.

Abstract: A distributed system includes multiple servers that various client devices access. Each server maintains a copy of a data object for access to the data object regardless of which server is accessed. Each server may modify a local copy of the data object, with the modifications propagated to other servers. A server generates a local version vector that includes pairs of a server identifier from whom modifications were received and a server-specific version identifier for the modifications. When a client device retrieves the data object, the client device transmits a client version vector for the data object including pairs of server identifiers and server-specific version identifiers from which the client device received version events for modifications to the data object. The server compares the local version vector to the client version vector to determine whether to transmit a local copy of the data object to the client device.

Abstract: Some embodiments of the disclosure provide an application apparatus for applying a medical instrument to a host. In some examples, the application apparatus includes a housing, an auxiliary mechanism, and a first driving mechanism. The housing includes a first holding portion, a proximate end which is close to the host during operation and a distal end which is far away from the host. The auxiliary mechanism includes a moving main body releasably held on the first holding portion and configured to move relative to the housing when released, an accommodating portion provided on the moving main body and configured to be coupled with the medical instrument, and a piercing member provided on the moving main body. The first driving mechanism is configured to apply a force to the moving main body in a mode of facing the proximate end.

Abstract: Compounds of General Formula I may act as thermally activated delayed fluorescent emitters in organic electroluminescent devices. Compounds of General Formula I have donor and acceptor groups part of the same conjugated system. Devices incorporating compounds of General Formula I may have higher EQE and longer material lifetimes.

Abstract: A flow control valve (1) includes a valve body (2), which is provided with a valve hole (21), a guide hole (22) and a lateral hole (23) that are in communication with each other, and a valve core (3), which is located in the guide hole (22), and can move in an axial direction of the guide hole (22) to control the opening and closing of the valve hole (21), thereby allowing or blocking the flowing of a fluid between the valve hole (21) and the lateral hole (23). The lateral hole (23) is internally provided with a connecting portion (231) connected to the valve hole (21), and the connecting portion (231) has a borehole surface (232) bored around an axis of the valve hole (21). The valve body (2) of the flow control valve (1) is provided with the lateral hole (23) and the borehole surface (232) located in the lateral hole (23), and the borehole surface (232) is located at a joint between the lateral hole (23) and the valve hold (21) and is arranged around the axis of the valve hole (21).

Abstract: An in-situ dynamic settlement test bench and method for the foundation soil is provided. The in-situ dynamic settlement test bench includes a vibration table system, a sensor embedded in the foundation soil, and a water injection trench around the foundation soil. A horizontal vibration load is applied to the lower foundation soil at an in-situ testing site by means of a vibration table, and the dynamic response of the foundation soil is measured through the sensors embedded in different positions, to reflect the seismic settlement deformation of the soil body. Dynamic settlement tests on soils include indoor dynamic simple shear, triaxial and torsional shear tests. A method is proposed for measuring the dynamic response and settlement deformation of the foundation soil by using a vibrator's vibration action on an in-situ soil column. Measurements of the acceleration response and seismic settlement deformation are taken for the foundation soil under in-situ condition.

Abstract: The present disclosure discloses a method for constructing and fabricating a preparation guide plate and a removable partial denture bracket model. The method includes: simulating implant placement in CBCT data of an oral cavity, and determining an implant placement site and an implant placement direction; in oral scan data, generating a simulated implant and marking a direction of an insertion path for a removable partial denture, the direction of the insertion path being consistent with the implant placement direction; marking a guide plane of an inner side of an adjacent tooth at an inner side of an adjacent tooth of the oral scan data based on the direction of the insertion path; and generating the preparation guide plate model based on an edentulous region, the adjacent tooth, and the guide plane of the inner side of the adjacent tooth in the oral scan data and a region to be removed.

Abstract: Compounds of General Formula I may harvest electrogenerated excitons via metal-assisted delayed fluorescence (MADF). The compounds have utility in light emitting diodes and light emitting devices.

Abstract: A terminal apparatus includes a first structural component, a second structural component, a third structural component, and at least one acoustic element, where the second structural component is located between the first structural component and the third structural component, and the first structural component, the second structural component, and the third structural component surround and form a cavity; the acoustic element is accommodated in the cavity; at least one sound emission slot is formed between the first structural component and the second structural component and/or between the second structural component and the third structural component, a sound guide slot is in communication with the sound emission slot, the sound emission slot is located on a side of the sound guide slot that faces away from the acoustic element, and the acoustic element transmits sound to the outside through the sound guide slot and the sound emission slot.

Abstract: A flow control valve includes a valve body (21), the valve body (21) having a valve seat part (211) provided therein, with a valve port (112) formed in the valve seat part (211); a spool (12), the spool (12) being axially movable to open or close the valve port (112), with a pressure-equalizing channel (121) provided in the spool (12), the pressure-equalizing channel connecting the valve port (112) and a back-pressure chamber (14), wherein the spool (12) has a substantially cylindrical lower end (222), and a conical hole (223) is formed in the spool (12), the conical hole (223) forming part of the pressure-equalizing channel (121), a bottom end of the conical hole (223) being located on a bottom plane (224) of the lower end (222), and the ratio of the diameter of the bottom end of the conical hole (223) to the diameter of the lower end (222) being greater than 0.88.